FREE Cisco tools: NetQoS network latency calculator

NetQoS is offering a free tool, the NetQoS Latency Calculator to help network engineers ensure application performance across the WAN.

The company claims this tool allows you to model network latency under a number of different scenarios. It models a client-server environment, where both client and server are attached to local area networks, and each network is attached to a router. The clientside and server-side routers are attached through some kind of wide area link. To calculate latency times, the tool also lets you input arbitrary request and response sizes, and lets you set delays for the client itself, claims NetQoS.

NetQoS Latency Calculator Screenshot:

Then, to model the WAN portion of the connection, you can set router latency, wide area link speed and distance for each of a pair of routers. On the server side, you can set server latency and response size. You can then click the Calculate button to produce response latency and request latency values, with accompanying pie charts to show how overall delay breaks across the various input values provided. You can also use the input data to produce a WAN bar chart that helps model variable data rates for frame relay or constant bit rates on T1 links, claims NetQoS.

"The latency calculator will tell you how long it would take to do an FTP transfer with different size files, for example,” said Bill Alderson - creator of the calculator and Technology Consulting Officer for NetQoS. "The calculator counts the number of round trips that are required and you can make the size whatever you’d like. Instead of having a packet size with a 1500 or an 8000 byte MTU maximum, you can simply crank in a 450GB file, and it’ll tell you how long it’ll take to serialize that file across the links you have selected."

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• Cisco
• Data Center
• LANs / WANs
• Network Management
• VoIP / Convergence
• Wireless / Mobile
• 8000 byte MTU maximum
• Ensure application performance across the WAN
• NetQoS is offering a free tool
• NetQoS Latency Calculator to help network engineers
• WAN bar chart